A company has four work centers A, B, C and D, with per day capacities of 450 units, 390 units, 360 units and 400 units respectively. The machines are laid down in order A, B, C, and D and product has to be operated on all these machines for getting converted into finished product.
The actual output turns to be 306 units per day. What is the system efficiency?
(a) 68% (b) 78%
(c) 80% (d) 85%